to get awed by caves in Oregon. This may be my favorite. It’s a mile long, self-guided lava tube. Around 42 degrees ...

As parts of the lava tube erode and crack over time, invading tree roots siphon moisture that collects, and forests thrive on the surface above. By contrast, lava caves, widely known as lava tubes ...

Just north of the Deschutes County Fairgrounds, the Redmond Caves, a series of five caves administered by the Bureau of Land ...